Commit-ID: 5efe08cf685f33f562566dc68b6077b6f6a4f706
Gitweb: http://git.kernel.org/tip/5efe08cf685f33f562566dc68b6077b6f6a4f706
Author: Frederic Weisbecker <fweisbec@xxxxxxxxx>
AuthorDate: Thu, 6 May 2010 04:55:22 +0200
Committer: Frederic Weisbecker <fweisbec@xxxxxxxxx>
CommitDate: Sun, 9 May 2010 13:45:29 +0200
perf: Fix perf lock bad rate
Fix the cast made to get the bad rate. It is made in the result
instead of the operands. We need the operands to be cast in double,
otherwise the result will always be zero.
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Hitoshi Mitake <mitake@xxxxxxxxxxxxxxxxxxxxx>
---
tools/perf/builtin-lock.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 3b304ed..d7dde9c 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -733,8 +733,8 @@ static void print_bad_events(int bad, int total)
{ "acquire", "acquired", "contended", "release" };
pr_info("\n=== output for debug===\n\n");
- pr_info("bad:%d, total:%d\n", bad, total);
- pr_info("bad rate:%f\n", (double)(bad / total));
+ pr_info("bad: %d, total: %d\n", bad, total);
+ pr_info("bad rate: %f %%\n", (double)bad / (double)total * 100);
pr_info("histogram of events caused bad sequence\n");
for (i = 0; i < BROKEN_MAX; i++)
pr_info(" %10s: %d\n", name[i], bad_hist[i]);
--
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